This may sound like a silly question but how does the cam journals get oil?
I know that the no.4 bearing gets some oil as a by product of feeding the rocker arm shaft.
The bearings had already been installed in my 170 when I installed the cam and didnt really look at the bearings other than to make sure that they were smooth and that the oil holes were lined up in the no.4 bearing.
HyperValiant

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1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress

Each cam bearing has an oil feed hole, the #4 cam bearing has 2 holes, the second one goes upward to feed the rocker arm shaft.

The SL6 design engineers were pretty clever, they actually have the main bearing oil feed cross-hole breaking-out, into the block's cam bearing bores. Basically, they drill one hole and it feeds the cam bearings and the crank bearings.

The down side to this design, installation of the cam bearings tends to 'pinch down' and restrict the oil flow in that area. I do a good amount of inspection & oil passage rework in this area, in order to insure good oil flow past the cam bearings and down to the crank where it is needed the most.
DD

Thanks Doc,I understand now.
HyperValiant

_________________
1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress